Teledyne LLG, LLD dimensions 2G-7. Automatic Flow Control Valve, 2G-8. Temperature Rise

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Model LLG & LLD Pool and Spa Heater

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3.Turn rotary switch to ON. Heater should start.

4.Pry out the top rubber dirt plug.

5.Use a 7/32 inch (5.55 mm) Allen wrench to turn the adjustment screw very slowly clockwise until the heater goes off (see Figure 18).

6.Slowly turn the pressure switch adjustment screw counter-clockwiseone-quarter turn. The heater should come back on.

7.Check the adjustment by turning the filter pump OFF. The heater should shut off immediately. If it does not, restart the filter pump and repeat Steps 6 and 7. Check the adjustment again.

8.Return the pool temperature control to the desired temperature.

2G-7. Automatic Flow Control Valve

The automatic flow control valve maintains the proper flow through the heater at rates up to approxi- mately 125 Gallons Per Minute (GPM) (474 liters per minute [LPM]). If the system filter-flow rate is higher than approximately 125 GPM (474 LPM), install a manual bypass valve (see Figure 18), then perform a temperature rise test (see Section 2G-8) and adjust the flow with the bypass valve until the proper temperature rise is obtained.

2G-8. Temperature Rise

A temperature rise test confirms proper water flow through the heater. The temperature rise is the difference between the temperature of the pool or spa water before and after heating, as measured in the header. Perform the following temperature rise test when the installation is complete:

1.Make sure the pool filter is clean.

2.Set the rotary switch on the temperature control panel (see Figure 17) to OFF.

3.Turn the filter pump off.

4.Remove the drain plug located on the right-hand side of the heater and replace it with a Pete's plug (see Figure 16).

5.Insert a pocket thermometer (see Figure 16) through the Pete's plug into the header.

6.Turn the filter pump on and wait 3 minutes. The heater is turned off.

7.Record the temperature indicated by the ther- mometer (cold water).

8.Turn the heater ON following the lighting in- structions found on the inside of the heater.

9.Allow the heater to run for about 3 minutes. Record the new temperature reading (heated water).

Figure 17. Thermometer and pressure relief valve.

10.Subtract the first temperature reading (cold water) from the second temperature reading (heated water). The difference between the two readings is the temperature rise. The temperature rise should be within the range shown in Table 6.

Table 6. Temperature Rise and Minimum Flow Rates

 

Minimum

Minimum

Maximum

 

 

 

 

 

 

 

Size

GPM

(LPM)

°F

(°C)

°F

(°C)

 

 

 

 

 

 

 

125

20

(76)

27

(15)

36

(20)

175

20

(76)

33

(19)

42

(24)

250

25

(95)

33

(19)

42

(24)

325

30

(114)

28

(16)

38

(21)

400

30

(114)

30

(17)

39

(22)

 

 

 

 

 

 

 

11.If the temperature rise is below the minimum range indicated, two possibilities arise:

a.The supply gas volume is too low.

b.The system's water flow exceeds 125 GPM (474 LPM), and requires a manual bypass valve for proper operation (see Figure 19).

12.If the temperature rise is above the maximum, there is not enough water flowing through the heater. Check for clogging in the water filter or restriction in the water pipes.

Caution

Operation with the temperature rise above maximum or below the minimum can damage the heater and may void the warranty.

13.If the temperature rise is within the correct range, complete the procedure as follows:

a. Turn heater off.

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Contents 1A. Introduction Section2B. Field Assembly 1C. Warranty1B. Description 1D. Technical Assistance2C-2. Outdoor Installation 2C-1. Installation Information2C. Site Location 2D. Combustion and Ventilation Air Supply 2C-3. Flooring Typical InstallationUnited States Canada2E-1. General Instructions 2E. Gas Supply and Piping2E-2. Special Precautions for Propane Gas LLG Only 2F. Electrical Wiring2F-2. Auxiliary Time Clock Wiring LLD or LLG 2F-1. General Information LLD OnlyLLD Connection/Schematic Wiring Diagram LLG Connection/Schematic Wiring Diagram 2G. Water Flow System 2G-1. Flange InstallationHeat exchanger reversal 2G-2. Reversible Water ConnectionsTemperature sensing bulb 2G-6. Adjusting the Pressure Switch 2G-3. Check Valve Installation2G-4. Chlorinators, Ozone Generators Sanitizing Chemicals 2G-5. Pressure Relief Valve2G-7. Automatic Flow Control Valve 2G-8. Temperature Rise2G-9. Adjusting the Manual Bypass Valve 3B. Lighting and Shutdown Procedures3A. General Information 3B-1. Model LLD see 3B-2. Model LLG seeDo not try to light any appliance 3B-1. Model LLD Direct IgnitionWhat to do if YOU Smell GAS 3B-2. Model LLG Standing Pilot3D. Seasonal Care 3C. Setting the Temperature Control3D-1. Spring and Fall Operation 3D-2. Winterizing3E. Water Chemistry 3F. Spa/Hot Tub Safety Rules3D-3. Spring Start-up 3H. Periodic Inspection 3G. Swimming Pool Energy Saving Tips3H-1. Owner Inspection 4A. General Information 4B. Parts List3H-2. Professional Inspection LLD Direct Ignition **-LLG Standing Pilot See For detail Detailed view of Heat Exchanger Assembly D Detailed view of LLG Burner Tray Assembly EDetailed view of LLD Burner Tray Assembly E Page Laars Lite Limited Warranty

LLD, LLG specifications

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